<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addRolesUser">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolesList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag
                  closable
                  @close="removeRightById(scope.row, item1.id)"
                  >{{ item1.authName }}</el-tag
                >
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6"
                    ><el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i
                  ></el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width="290">
          <template slot-scope="scope">
            <el-button
              size="mini"
              type="primary"
              icon="el-icon-edit"
              @click="editRolesUser(scope.row.id)"
              >编辑</el-button
            >
            <el-button
              size="mini"
              type="danger"
              icon="el-icon-delete"
              @click="deleteUserById(scope.row.id)"
              >删除</el-button
            >
            <el-button
              size="mini"
              type="warning"
              icon="el-icon-s-tools"
              @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            ></template
          >
        </el-table-column>
      </el-table>
      <!-- 添加角色对话框 -->
      <el-dialog
        title="添加角色"
        :visible.sync="dialogVisible"
        width="30%"
        @close="rolesClosed"
      >
        <el-form
          :model="rolesForm"
          :rules="rolesRules"
          ref="rolesFormRef"
          label-width="80px"
        >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="rolesForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="rolesForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="dialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addDialogUser">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 编辑角色对话框 -->
      <el-dialog
        title="编辑角色"
        :visible.sync="editDialogVisible"
        width="30%"
        @close="editClosed"
      >
        <el-form
          :model="editForm"
          :rules="editRules"
          ref="editFormRef"
          label-width="80px"
        >
          <el-form-item label="角色名称" prop="roleName">
            <el-input v-model="editForm.roleName"></el-input>
          </el-form-item>
          <el-form-item label="角色描述" prop="roleDesc">
            <el-input v-model="editForm.roleDesc"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editDialogUser">确 定</el-button>
        </span>
      </el-dialog>
      <!-- 分配权限对话框 -->
      <el-dialog
        title="分配权限"
        :visible.sync="setRightDialogVisible"
        width="30%"
        @close="setRightDialogClosed"
      >
        <el-tree
          :data="rightsList"
          :props="defaultProps"
          show-checkbox
          node-key="id"
          default-expand-all="true"
          :default-checked-keys="defKeys"
          ref="treeRef"
        ></el-tree>
        <span slot="footer" class="dialog-footer">
          <el-button @click="setRightDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="allotRights">确 定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>
<script>
export default {
  data() {
    return {
      rolesList: [],
      dialogVisible: false,
      editDialogVisible: false,
      setRightDialogVisible: false,
      rolesForm: {
        roleName: '',
        roleDesc: ''
      },
      rolesRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur' }
        ]
      },
      editRules: {
        roleName: [
          { required: true, message: '请输入角色名称', trigger: 'blur' },
          { min: 2, max: 10, message: '长度在 2 到 10 个字符', trigger: 'blur' }
        ]
      },
      //   查询角色
      editForm: {},
      //   所有权限数据
      rightsList: [],
      //   树形控件的属性绑定对象
      defaultProps: {
        children: 'children',
        label: 'authName'
      },
      //   默认选择节点id值数组
      defKeys: [],
      roleId: ''
    }
  },
  created() {
    this.getRolesList()
  },
  methods: {
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色列表失败')
      }
      //   console.log(res)
      this.rolesList = res.data
    },
    // 添加角色按钮
    addRolesUser() {
      this.dialogVisible = true
    },
    // 监听表单关闭后重置表单
    rolesClosed() {
      this.$refs.rolesFormRef.resetFields()
    },
    // 添加角色
    addDialogUser() {
      this.$refs.rolesFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        const { data: res } = await this.$http.post('roles', this.rolesForm)
        // console.log(res)
        if (res.meta.status !== 201) {
          return this.$message.error('添加角色失败')
        }
        this.$message.success('添加用户成功')
        this.dialogVisible = false
        this.getRolesList()
      })
    },
    async editRolesUser(id) {
      //   console.log(id)
      const { data: res } = await this.$http.get('roles/' + id)

      if (res.meta.status !== 200) {
        return this.$message.error('查询用户信息失败')
      }
      this.editForm = res.data

      this.editDialogVisible = true
    },
    editClosed() {
      this.$refs.editFormRef.resetFields()
    },
    // 提交编辑表单
    editDialogUser() {
      this.$refs.editFormRef.validate(async valid => {
        // console.log(valid)
        if (!valid) return
        console.log(this.editForm)
        const { data: res } = await this.$http.put(
          'roles/' + this.editForm.roleId,
          {
            roleName: this.editForm.roleName,
            roleDesc: this.editForm.roleDesc
          }
        )
        // console.log(res)
        if (res.meta.status !== 200) {
          return this.$message.error('修改角色失败')
        }
        this.$message.success('修改用户成功')
        this.editDialogVisible = false
        this.getRolesList()
      })
    },
    // 删除角色
    async deleteUserById(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 确定删除返回字符串confirm
      // 取消删除返回字符串cancel
      //   console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      const { data: res } = await this.$http.delete('roles/' + id)
      if (res.meta.status !== 200) return this.$message.error('删除用户失败')
      this.$message.success('删除用户成功')
      this.getRolesList()
    },
    // 根据id删除对应的权限
    async removeRightById(role, rightId) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      // 确定删除返回字符串confirm
      // 取消删除返回字符串cancel
      //   console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已经取消删除')
      }
      //   console.log('确认删除')
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败')
      }
      role.children = res.data
    },
    // 展示分配权限对话框
    async showSetRightDialog(role) {
      this.roleId = role.id
      const { data: res } = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败')
      }
      this.rightsList = res.data
      //   console.log(this.rightsList)
      //   递归获取三级节点id
      this.getLeafKeys(role, this.defKeys)
      this.setRightDialogVisible = true
    },
    // 监听权限分配权限对话框关闭
    setRightDialogClosed() {
      this.defKeys = []
    },
    // 通过递归的形式,获取角色下所有三级权限的id,并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性,则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败')
      }
      this.$message.success('分配权限成功')
      this.setRightDialogVisible = false
      this.getRolesList()
    }
  }
}
</script>
<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>
